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The Source for Dr y Process ing and Bulk Handl ing Technology
MAY 2009 IN THIS ISSUE•
Offi cial Publication of the
Conference and Exhibition
www.
.com
Find equipment, articles, and news in our Industry Zones
flow factor - ff
1
1
Feeders SpotlightMetalfab Inc. offers Better-Weigh continuous feeders for gravimetric feeding of dry bulk materials.Read more on page 8
Drive-Through SilosWhen Franklin Industrial Minerals began a project to process chemical-grade limestone, the company needed additional storage.Read more on page 20
Optimizing the Cost of HoppersNew software, in combination with modern automated powder testers, demystifies hopper design. Read more on page 22
Bulk Bag Filler
This basic bulk bag filler performs low-capacity filling operations at minimal cost. The unit can be upgraded with performance enhance-ments, including a
material delivery system integrated with the user’s process equipment or bulk storage vessels. The Model BFB filler is a lighter-duty version of the heavy-gauge Twin-Centerpost filler. The unit features a patented design with two on-center posts that offers the structural integrity of four-post fillers, but at lower material and fabrication costs, and with less weight. It also affords easier access to the bag spout and loops. The filler is equipped with fill head height adjust-ment to accommodate all popular bag sizes, in addition to an inflatable cuff to seal the bag inlet spout, and a feed chute vent port for dust-free air displacement during filling.Flexicon Corp., Bethlehem, PA 888-353-9426 www.flexicon.com
Pulverizing Systems
Powder King Anthem (PKA) series pulverizing systems have a streamlined look and provide increased production rates, low maintenance costs, and ease of operation. Features include: a direct-drive mill; HY-PRO disks; an advanced streamline mill design; pocketed disks mounting on flywheel and water jacket; segmented disk mount-ing clamps; disk gap adjusters that use one simple Allen wrench for gap setting; a PLC control panel with touch screen operator interface; multideck sifters; and a compact footprint.Powder King LLC, Anthem, AZ 623-551-9897 www.powder-king.com
Should You Consider a Mobile Mill System?Read more on page 12
PBS0905 001 1 4/10/09 7:31:59 AM
FILLER FOR PALLET JACK BAG REMOVALLow profile version of patented TWIN-CENTERPOST™ filler allows removal of filled bags using a pallet jack, eliminating the need for a forklift or roller conveyor. Low cost standard models offered with many performance options.
BULK BAG FILLER USES PLANT SCALEFull length forklifting tubes allow positioning of this TWIN-CENTERPOST™ filler model on a plant scale as needed, allowing you to fill by weight without investing in load cells and automated controls.
FILLERS WITH AUTOMATED FEEDING SYSTEMSEvery Flexicon filler is offered with pneumatic (shown) or mechanical (bottom right) feeding/weighingsystems, as well as inlet adapters
to interface with optional overhead storage vessels.
COMBINATION BULK BAG/DRUM FILLERPatented SWING-DOWN® filler features a fill head that lowers and pivots down for safe, easy bag spout connections at floor level, and a swing-arm-mounted chute for automated filling and indexing of drums.
PATENTED SWING-DOWN® FILLERFill head lowers, pivots and stops in a vertically-oriented position, allowing operator to safely and quickly connect empty bags at floor level and resume automated filling and spout-cinching operations.
CANITILEVERED REAR-POST FILLEROffered with performance options including: powered fill head height adjustment, pneumatically retractable bag hooks, inflatable bag spout seal, dust containment vent, roller conveyor, and vibratory bag densification/deaeration system.
BASIC FILLER FOR TIGHTEST BUDGETSA lighter-duty version of the economical TWIN-CENTERPOST™ filler, the BASIC FILLER reduces cost further still, yet has an inflatable bag spout seal and feed chute dust vent as standard, and a limited list of performance options.
PATENTED TWIN-CENTERPOST™ FILLERTwo heavy-gauge, on-center posts boost strength and access to bag hooks while reducing cost. Standard manual fill head height adjustment, and feed chute vent for displaced dust.Numerous performance options. First filler to receive USDA acceptance.
X-0
448
Fill one bulk bag per week or 20 per hourat the lowest cost per bag
Flexicon’s extra-broad model range, patented innovations and performance enhancements let you exact-match a filler to your specific cost and capacity requirements
USA
[email protected] 888 FLEXICON
See the full range of fast-payback equipment at flexicon.com: Flexible Screw Conveyors, Pneumatic Conveying Systems, Bulk Bag Unloaders, Bulk Bag Conditioners, Bulk Bag Fillers, Bag Dump Stations, Drum Dumpers, Weigh Batching and Blending Systems, and Automated Plant-Wide Bulk Handling Systems
©2009 Flexicon Corporation. Flexicon Corporation has registrations and pending applications for the trademark FLEXICON throughout the world.
NEW
UK
AUSTRALIA
SOUTH AFRICA
+44 (0)1227 374710 +61 (0)2 9484 2083+27 (0)41 453 1871
PBS0905 002 2 4/10/09 7:32:19 AM
Powder/Bulk Solids4 Editor’sChoice
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Vacuum Conveying
The VS series for vacuum
conveying replaces the VR series
and offers numerous upgrades,
including improved module con-
nection, a quick-change filter sys-
tem, and improved discharge mod-
ules.There are also fewer moving
parts, which optimizes perfor-
mance. Key features include: a
new and improved patented mod-
ule system with common seals for
more-efficient, easier cleaning and
mistake-free reassembly; a new
filter system with quick snap-on
connection that combines radial
and axial sealing, hygienic sealing,
and no-tool assembly; and im-
proved discharge modules that of-
fer increased discharging diameter
and external pneumatic drive. The
discharge modules allow for quicker release of material and no pneumatic
parts inside the conveyor to contaminate material flow.
Volkmann Inc., Hainesport, NJ 609-265-0101 www.volkmann.info/en
Compact Vacuum
The Nilfisk CFM 127 is a
compact, intermittent-duty
vacuum, designed with all the
features of larger models. It is
ideal for general cleaning, collec-
tion, and containment of fine
powders and toxic debris in
specialized applications. Other
features and benefits include a
large main filter that provides
more surface area for filtering
and resists premature clogging
(optional upstream HEPA filter
provides 99.97% efficiency, down
to and including 0.3 m); and an
external filter shaker handle
that keeps the main filter free
of clogging dust and main-
tains the vacuum’s maximum
suction power and filtration
performance. Suction perfor-
mance is monitored by a manometer and
light, which allows the user to know when the filter needs to be
cleaned or replaced. A sound suppressor diffuses the exhaust air
for optimum noise control; and it has a strong, solid construction
with high-quality materials (steel, stainless steel, ABS plastic).
Nilfisk CFM, Malvern, PA 610-647-6420 www.stop-the-dust.com
Rotary Valve
The UltraValve
complements the
tough severe-duty
PMV rotary valve
line. It uses a case-
hardening process
that increases
abrasion- and cor-
rosion-resistance,
while exhibiting high fatigue strength. Like other PMV rotary
valves, this valve can be quickly rebuilt from off-the-shelf parts.
It has been tested extensively in the most demanding applications.
Precision Machine & Mfg. Inc., Eugene, OR 541-484-9841
www.premach.com
Large Tank Washers
TankJet 4 tank washers provide high-
impact cleaning of tanks up to 98 ft.
They provide consistent impact over the
entire pressure range to ensure superior
cleaning. They are equipped with special
nozzles that minimize turbulence and im-
prove stream integrity for increased impact
and greater cleaning effectiveness. The
nozzles rotate 360° in horizontal and vertical
planes, creating a crisscrossing pattern that
thoroughly cleans tanks of even difficult-to-
remove residues. The units are sleek and
compact and fit in tank openings of 6.7 in.
Pin and clutch versions are available to ac-
commodate both permanent installations
and portable operation. A variety of nozzle,
rotor, and stator sizes are also available so
the units can be easily customized based on
application requirements.
Spraying Systems Co., Wheaton, IL 630-665-5000
www.spray.com
Fusion Screens
Fusion screens were developed from a new technology that fuses
the screen mesh to the tension ring. The screens have been de-
signed to eliminate the use of adhesive, epoxy, or silicone in screen
manufacturing, resulting in a unitary construction that minimizes
the potential for contamination. Added benefits include precise
repeatable tensioning and engineered uniform integral strain relief
created from the complex robotic manufacturing process. Robotic
manufacturing also results in faster turnaround for improved lead
time and service. The screens are comprised of the gasket, strain
relief, and screen frame as one molded part. As an option, a one-
piece center disk with integral strain relief is also available for
screens needing center support. The screens are available in stan-
dard Fusion and Fusion Plus construction. Fusion Plus has FDA-
approved components for use in sani-
tary applications and higher
temperature limits.
Sweco, Florence, KY
859-371-4360
www.sweco.com
www.
.com
Check out our Industry Zones
for equipment, articles, and
news headlines at
www.PowderBulkSolids.com
PBS0905 004 4 4/10/09 7:35:22 AM
Less degradationMove your dry granular materi-als gently, reliably and withsignificant reductions in productdegradation and/or systemwear.
Proven capabilityDynamic Air dense phase pneu-matic conveying systems havebeen proven in over 10,000installations worldwide. Theyhandle a wide range of materialsand bulk densities at rates from afew hundred pounds to 400 tonsper hour, over distances exceeding5,000 feet.
Sixteen conceptsEach Dynamic Air system iscustom designed from one of oursixteen different conveyingconcepts. So you get a conveyingsolution that fits your processperfectly, without compromises.
Cost effectiveOur high material-to-air ratiosreduce energy and compressedair requirements. Our low con-veying velocities provide signifi-cant process savings in bothoperation and maintenance.Initial cost is surprisingly afford-able too, thanks to our modular
BulkBusterTM Bulk Bag Unloader Bella® Twin ShaftFluidized Zone Mixer
Dyna-SlideTM High PrecisionAir-Activated Feeder
Dense Phase Transporter, J-Series
BagBuster® Bag Breaker
Modu-Kleen® Bin Vent Filter
Blendcon® Air Blending Head
Multi-Port Switch - Up to 15 positions
BULKBUSTERTM
BULK BAG
UNLOADER
MANUAL
HOSE SWITCH
VIBRA-JET®
BIN AERATOR
WEIGH
HOPPER
BELLATM
TWIN SHAFT
FLUIDIZED
ZONE MIXER
TRANSPORTER
CONVEYING LINE
SWITCH
RECEIVER
MODU-KLEEN
BIN VENT
FILTER
BAGBUSTER®
BAG BREAKER
BLENDCON®
SILO
BLENDER
BLENDCON®
AIR BLENDING
HEAD
DYNA-SLIDETM
HIGH PRECISION
AIR-ACTIVATED
FEEDER
®
BULK
BAG
STORAGE
SILO
STORAGE
SILO
The Smart Way to Unload, Convey, Weigh & Mix
design concept and ease ofinstallation.
Write or call us today with yourquestions, or for detailed infor-mation on our system applica-tions.
Dynamic Air Inc.St. Paul, MN
Phone +1 651 484-2900
Fax +1 651 484-7015
www.dynamicair.com
PBS0905 005 5 4/10/09 7:35:40 AM
6
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IndustryInsight
T
Choosing the Right Size Reduction EquipmentThomas E. Warne
There are almost as many different methods of
performing size reduction on materials as there are
materials themselves. Consequently, choosing the best
piece of equipment for any given product can be a
daunting task. The nature of the material, initial size,
required particle size after processing, tonnage, and
available space must be considered in the selection
process. Focusing on preliminary and secondary grind-
ing, I will look at some common types of equipment
used for size reduction with the goal of narrowing this
selection process.
Impact crushing: equipment that contains apparatus
designed to deliver a severe blow to the material,
causing it to shatter. Typical equipment falling into this
category includes hammer mills, impactors, and certain types of lump breakers.
Materials that lend themselves to this type of machinery include friable products,
such as agglomerated powders, stone, glass, ceramic, and other brittle materi-
als. Impactors are generally used when the feed stock is large and the tonnage
requirement high. They are limited in ability to produce a fine material and are
generally used as an initial step in processing. Hammer mills can accept a mid-
size feed stock and can reduce most materials to granular or powder consistency
if necessary. Particle size can easily be controlled when using a hammer mill by
changing the screen size and rotor speed. Lump breakers are generally used to
reduce agglomerated materials in order to make them flowable when a specific
particle size is not required. They are most commonly found with either a dual
shaft rotor assembly, or with a single rotor assembly with the blades passing
through a comb.
The advantages of impact crushers are generally lower acquisition costs, low
cost of replacement parts, simplicity, high production rates, and greatest control
over particle sizing. Disadvantages include higher horsepower requirements,
somewhat louder operation, and, with the possible exception of the lump breaker,
the requirement for manual or metered feeding.
Compression crushing: machines that reduce the size of materials by squeezing
the product between two surfaces, such as jaw and cone crushers. Compression
crushers are most commonly used in the quarry industry for preliminary crush-
ing of rock, but can be found in many other industries as well. A compression
crusher is an ideal selection when the material to be crushed is fairly large and
abrasive, and when a fine particle size is not required.
The advantages of compression crushing machines are their ability to process
abrasive materials at high rates of throughput with minimal wear. Disadvantages
include weight and girth of the equipment and minimal particle-size control.
Shredding: machines that rip or shred typically nonfriable materials, such as
rubber, plastics, and metals. The two most common styles of shredders are dual-,
counter-revolving-shaft designs, or single-shaft, ram-fed machines. Dual-shafted
machines pull the material down between the two counter-revolving shafts.
Single-shafted shredders have cutter teeth affixed to a solid rotor. A hydraulic ram
pushes the material in the hopper against the revolving shaft. The teeth cut and
pull the material down through an anvil featuring a zigzag pattern. Often shred-
ders are provided with a sizing screen to control the output particle size. These
machines operate at low speed and with high torque.
The advantages of these shredders are their ability to accept a hopper of mate-
rial, lower horsepower requirements, ability to operate unmanned, and generally
quieter operation. Disadvantages include higher initial cost, more costly replace-
ment parts, and, in the case of the ram-fed grinder, lower production capacities.
Many of the pieces of equipment listed above can be used outside of their
mainstream design. Hammer mills can act as shredders on some materials, while
jaw crushers can be used as lump breakers. Often a combination of machines is
the best approach. Jaw crushers or shredders are often used as the initial stage,
followed by hammer mills for finish grinding. A combination of machines may
be more practical and economical than trying to get one machine to perform
multiple tasks that do not suit its capabilities.
When looking to purchase a piece of size-reduction equipment, remember the
adage, “there’s more than one way to skin a cat.” With a little homework, you
can find the equipment that will not only work, but work optimally.
Thomas E. Warne is president, CEO, and co-owner of Schutte-Buffalo Hammermill
LLC (Buffalo, NY), which manufacturers a wide range of size reduction equipment.
Thomas E. Warne
DIFFICULT CONVEYING
SITUATIONS ARE NO PROBLEM
FOR THE RAPAT SERIES FLXOur Series FLX Conveyors are designed forapplications requiring steep inclines... up to90 degrees!
OPEN CHANNEL FRAME FLX
Structural channel frame (shown below) isopen to allow easy access to the idlers formaintenance and inspection.
(800) 325-6377919 O’Donnell Street, Hawley, MN 56549-4310 USA
(218) 483-3344 n Fax (218) 483-3535www.rapat.com n E-Mail: [email protected]
ENCLOSED
FRAME
FLXEnclosure keeps dust and
emissions contained within the enclosurefor a safer, cleaner work environment.
PBS0905 006 6 4/10/09 7:36:50 AM
www.PowderBulkSolids.com 7
Ma
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TechnologyReview
Crusher
The Delumper 1075 LP crusher reduces hard or soft, heat-sensitive, sticky, or wet agglomerates and
lumps at high volume without degrading the material or causing rise in temperature. The unit’s low-
friction cutting action is ideal for large quantities of sludge cake, agglomerated chemicals, plastics,
fats, waxes, or solid waste. It employs extended cutting teeth that rotate completely through a heavy
bar cage, self-clearing the slots with each rotation. Output sizes are adjustable by changing the speed
or the comb. Franklin Miller Inc., Livingston, NJ 800-932-0599 www.franklinmiller.com
Horizontal Shaft Impactor
The Grand Slam secondary horizontal
shaft impactor now features two new
product developments: a new grind-
ing path and an apron adjustment
system. This impactor series uses
high-chrome metallurgy to increase
the wear life of machine components,
thereby reducing metal replacement
costs. Used for a wide variety of in-
dustrial applications including alumi-
num dross and brick, clay, shale, grog,
refractory brick, ceramics, floor tile,
glass, bakery waste, and scrap carbide
recycling, the unit reduces material
size more efficiently with maximum
uptime. The Crush Plus grinding
path system creates a third crushing
chamber to maximize one-pass prod-
uct yield, minimize oversize, improve
material soundness, and produces
highly cubical product. The Max-Yield
automated apron adjustment system
maintains gap setting adjustment for
aprons and the grinding path.
Stedman, Aurora, IN 800-262-5401
www.stedman-machine.com
Power Graters
This family of power graters process
soft to medium-hard products such
as filter cakes, foodstuffs, plastics,
and salts in nominal capacities rang-
ing from 2 to 4 tn/hr. All models are
available with motor options and low-
speed drives for low operating sound
levels. Various materials of con-
struction—mild steel, stainless steel,
Hastalloy, etc.—and screen sizes are
also available to suit the mechanical
and chemical elements of the applica-
tion. Custom designs include sanitary
construction, mount stands, and
integrated controls.
S. Howes Inc., Silver Creek, NY
888-255-2611 www.showes.com
www.
.com
Check out our Industry Zones at
www.PowderBulkSolids.com
Size Reduction
ProductFocus
Munson Machinery Company, Inc.
210 Seward Ave.Utica, NY, 13503 USA
800-944-6644
In NY: [email protected]
Visit the website for details on this and other Munson equipment including ContinuousRotary Blenders, High IntensityBlenders, Rotary De-Clumpers,Attrition Mills, Hammer Mills and Shredders.
RIBBON
BLENDERS
Ribbon, plow or paddle stylesto 800 cu ft at low cost
PIN MILLS
Coarse to 200 mesh milling, sizing, de-lumpingand homogenizing of fibrous and other materials
SCREEN
CLASSIFYING
CUTTERS
Patented rotary cutter bladeswith replaceable inserts cuttough materials into precisesizes with minimum fines
ROTARY
BATCH MIXERS
Gentle, homogeneous blendingand uniform coating with nosegregation on discharge. Lab to 600 cu ft sizes
Dry Screening Reaches New Heights
The new APEX™ Screener from ROTEX Global, LLC is the smart solution for dry screening. The APEX delivers higher productivity and lower
gyratory-reciprocating motion as the ROTEX®
Screener. The new APEX increases up-time with side access doors that enable quick screen changes and cleaning by one person.
™ can increase your productivity, go to rotex.com/apex, or call 1-800-453-2321.
©2009 ROTEX Global, LLC
40 Stonehill Rd., Oswego, IL 60543
Phone: 630/554-7804 • Fax: 630/554-7805
[email protected] • www.productsaver.com
Designed and manufactured To Your SpecsTo Open bags Up to 100lbs.—2,000 lbs./minute—
AUTOMATIC BAG OPENER
From PRODUCT SAVER®
Makes Manual Methods Obsolete!
This equipment from
Product Saver is
designed for high-
speed pre-processing
and reclaim bag open-
ing applications. It can
accommodate multiple
size bags and bundles
up to 100 lbs. without
equipment adjustment.
These bag openers can handle all types of products.
Stainless or carbon steel construction.
PBS0905 007 7 4/10/09 7:38:02 AM
Powder/Bulk Solids 8 Editor’sSpotlight
Ma
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• Feeders
Heavy-Duty Weigh Belt Feeders
High-capacity, heavy-duty MH and MDH weigh belt feeders accurately
measure and control feed rates of up to 3000 tn/hr. Originally designed
for the cement and steel industries, these models feed materials such as
limestone, mill scale, dolomite, iron ore pellets, fluorspar, and coke. The
feeders were also designed to withstand harsh environmental factors,
such as abrasive dusts, corrosive fumes, wide temperature fluc-
tuations, and vibrations, without any
detrimental effects on perfor-
mance or accuracy. Thayer Scale-Hyer
Industries Inc.,
Pembroke, MA
781-826-8101
www.thayerscale.com
Regrind and Powder Feeders
This company has now incorporated regrind and
powder feeders for use on all sizes of its line of
Guardian gravimetric batch blending systems. The
feeders are both auger type for use with difficult-
to-flow sheet regrind and ground up scrap from
sprews of off-spec parts, or a wide range of difficult
to feed, powder materials. In most sheet, in-line
thermoforming, and molding applications, customers
need the capability of feeding up to 50% or more of
ground scrap back into the process. By refeeding this
material back through a gravimetric blending system,
the amount of scrap can be controlled and recorded.
Process Control Corp., Atlanta, GA 770-449-8810
www.process-control.com
Heavy-Duty Vibratory Feeders
These vibratory feeders are designed to smoothly convey products.
Flow of material is adjustable and the flow rate can be variable or
fixed. Available in electric- or air-operated models, the feeders can
be designed with above-, below-, or side-mounted drives and can be ar-
ranged for base mounting or overhead suspension. The units come in
custom vibrating trough lengths with special trough
designs available. Feeders
are available in several
basic models includ-
ing air-operated
light duty, air-op-
erated heavy duty,
twin-motor vibrating
pan and grizzly feeders,
electromagnetic, twin motor, and
special-application feeders.
Metso Minerals Industries Inc.,
Brunswick, OH 800-827-9237
www.metso.com
Rotary Airlock Feeder
The Dust Collector Series (DCS) rotary
airlock feeder is an economical valve
suited for general use under dust collec-
tors, cyclones, and hoppers. This feeder
features eight-blade rotors, precision
machining, and rugged cast iron housing
for efficient operation. In a case where
pressure differential exists, such as when
feeding pneumatic conveying lines, this
unit is best suited for feeding the mate-
rial accordingly. These particular airlocks
maintain the highest level of performance for
an extended period of time. The Quick-Take-Apart
(QTA) series rotary airlock feeder is made for applications where frequent
removal of the valve internals is required. This valve permits tool-less
removal of the rotor and end plate as one piece, thereby eliminating the
time-consuming step of gapping the rotor during reassembly. When en-
countering alumina, coke, fly ash, glass frit, and other highly abrasive
products, the Ceramic Series rotary airlock feeder sustains its durability
and achieves at least 3–5 times longer life compared with chrome and
Ni-hard valves.
Prater-Sterling, Bolingbrook, IL 630-759-9595 www.prater-sterling.com
Batch and Continuous Feeders
Better-Weigh continuous feeders are used for gravimetric feeding of dry
bulk materials where it is necessary to determine actual feed rates on a
loss-of-weight basis. Available in seven models with feed rates from 1 to
550 cu ft/hr (larger sizes available), these units are designed to provide
feeding in either batch or continuous mode depending upon the arrange-
ment of the feeder’s control electronics. In batch mode, the batch con-
troller is used to control the fast (bulk) and slow (dribble) speeds of the
feeder. Accuracies of ±0.5% can
be easily achieved in 2-lb or less
batches, and ±0.25% with 3-lb or
greater batches with time spans of
30–90 seconds. In continuous mode,
the feeder’s electronic controller is used
to constantly monitor loss-of-weight of
material per time in order to maintain
a continuous loss of weight with
an accuracy of ±0.25 to 0.50%.
Standard features include a plat-
form or lever balance scale, sealed
tactile keyboard, seven-digit numerical
keyboard, automatic manual batching, and a
2- or 5-cu-ft hopper. Sanitary construction is
also available.
Metalfab Inc., Vernon, NJ 800-764-2999
www.metalfabinc.com
Magnetic Belt Feeder
The MBF series magnetic
belt feeder is designed
to trap ferrous materials
that would otherwise con-
taminate final products.
Engineered to provide max-
imum elimination of metal
contaminants, it consists
of a belted conveyor with
an integrated magnetic head pulley. As product reaches the end of the feeder’s
conveyor, it passes through a magnetic field. Any ferrous tramp metals adhere
to the belt and are carried around the pulley toward the return side of the con-
veyor. Gravity causes clean, nonferrous materials to exit and fall away from the
system. Ferrous metals are carried around the head pulley and are transported
away from the magnetic field where they fall from the conveyor belt, typically
into a metal collections area.
Magnetic Products Inc., Highland, MI 800-544-5930 www.mpimagnet.com
www.
.com
Check out our
Feeders Industry Zone
for equipment, articles,
and news headlines at
www.PowderBulkSolids.com
PBS0905 008 8 4/10/09 7:41:01 AM
• Feeders
www.PowderBulkSolids.com 9
Vibratory Feeder
Feeding up to 4 tn/hr, the Model 26C vibratory
feeder is a rugged ac-operated unit for linear, ac-
curate feeding of large quantities of bulk materi-
als. This electromagnetic feeder provides a com-
pact, robust design and can withstand significant
material loading from hoppers or chutes, while
maintaining consistent feed. These ac-operated
electromagnetic feeders offer excellent feed ad-
justment and linearity to help optimize processes.
This unit is commonly applied to plastics, grain,
and chemical applications.
Eriez, Erie, PA 888-300-3743 www.eriez.com
Screw Feeder
This screw feeder combines the versatility of flex-
ible hopper technology with a 2-in-1 feed screw
option that improves gravimetric batch accuracy.
Historically, users have had to choose between speed
and accuracy; a screw large enough to provide the
desired batch speed also caused feeders to routinely
overshoot the set point with varying results. Because
the PosiPortion feeder actually uses two independently
driven screws, situated one inside of the other, it is capable of
delivering precision batches fast.
Hapman, Kalamazoo, MI 800-427-6260 www.ideasthatmove.com
Volumetric Feeder
This tool-free, quick-take-apart volumetric feeder is available in sizes ranging from 2 to
6 in. in diameter. Twin-screw feeders up to 3-in. in size provide high-speed accu-
rate feed. The feeder is modular in construction and features a heavy-duty inlet
boot section. A parallel shaft gear reducer with an industry-standard C-face motor
eliminates proprietary parts and provides a wide feed range. Every part is
precision fabricated and is easily taken apart without the use of tools.
The boot section has a flush bottom for positive draining. The
feeders are suited for both volumetric and gravimetric ap-
plications. Many hopper and agitator modules are available.
Units for food-grade applications are also available.
HAF Equipment Inc., Centerville, MN 651-653-5098
www.hafequipment.com
Composite Feeder
The AccuFeed uses molded composite components and a
modular design to reduce cost and delivery time. Available
in capacities up to 600 cu ft/hr, the patented unit employs
controlled vibration to achieve volumetric accuracies of
±1 to 2%. The machine disassembles quickly for cleaning
and meets FDA and USDA sanitary requirements. Popular
sizes are stocked for immediate delivery. AccuFeeds may
be scale mounted for batch or continuous weigh feeding
applications.
Vibra Screw Inc., Totowa, NJ 973-256-7410
www.vibrascrew.com